Tool-dressing device



C. G. OLSON.

TOOL DRESSING DEVICE.

APPLICATION FILED mmzo, 1919.

1,357,814. Patented Nov. 2, 1920.

2 SHEETS-SHEET I.

Lr/ 0 cm.

C. G. OLSON. TOOL DRESSING DEVICE. APPLICATION FILED MAR.20, 1919.

Patented Nov. 2, 1920.

2 SHEETS SIHEET 2.

UNITE STT.

TENT OFFICE.

CARL G. OLSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO ILLINOIS TOOL WORKS, OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TOOL-DRESSING DEVICE.

To all whom it may concern:

Be it known that I, CARL G. OLsoN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Tool-Dressing Devices,of which the following is a specification.

My invention relates to tool dressing devices and in the formillustrated constitutes an attachment which may be applied to grindingmachines such, for example, as illustrated in my prior Patent No.1,232,715, issued July 10, 1917. It is important that the grinding tool,which in the present case is shown in the form of a so called grindingpoint, should be kept accurately trued or dressed, and the generalobject of my in vention is to provide an attachment which may be readilyappliedto or removed from a grinding machine for the purpose of dress-.ing the grinding tool., Another and more specific object oftheinvention is to provide .means for changing the obliquity or tilt of theguide which carries the tool holder or slide, the purpose being to varyat will the angle of the surface to be formed on the dressing tool.Another object is to provide .simple and convenient means by which thedressing tool, may be adjusted in the slide.

I obtain my objects by-the mechanism illustrated in the accompanyingdrawings, in which Figure 1 is a side iew of my device shown in positionupon a grinding machine.

Figs. 2 and 3 are plan and perspective views, respectively of the partsshown in Fig. 1.

Fig.4 is a section taken on'the irregular line 4-4, Fig. 1.

Like numerals denote like parts throughout the several views.

In the form shown, the grinding machine of which my present device formsan at-' tachment, has a block 1 which supports the housing 2 in whichthe spindle 3 is journaled. While the type of spindle and spindlehousing may be varied, and are immaterial for the present purposes, asuitable construction is shown'in detail in my prior Patent No.1,232,714, issued July 10, 1917. The spindle is driven at high speed bymeans of a sheave 4 or other suitable power device, and is adapted tohold the grinding tool, such for example as the grinding point 5.

Referring to the parts more intimately Specification of Letters Patent.

Patented Nov. 2, 1920.

Application filed. March 20, 1919. Serial No. 283,733.

connected with my present invention, a frame 8 is fastened by bolts 6and nuts 7 to block 1, and serves to clamp the housing 2 in position init. This frame has two ears 9, 9 which carry two horizontally arrangedcenter points 10, 10 which form pivot bearings for a guide 12 which isarranged be tween them. The construction is shown in section in Fig. 4.At one side said guide has an Lip-standing arm 13 which carries anoutward projecting pin 14 which extends into a slot 15 formed in thelip-standing arm 16 of the supporting frame 8. By preference the arm 16is simply an upward exten- SlOIl of one of the ears 9. Pin 14 liesbetween the opposing ends of two set screws 18, 18 mounted on arm 16,and by properly manipulating them the guide may be held at any desiredangle of obliquity in frame 8.

Longitudinally, slidable within the guide 12 is a slide 20 provided atthe rear end with a handle 21 by which it may be'reciprocated in theguide. At the forward end of the slide there is an aperture 22 throughwhich the dressing tool 23 passes. The lower end of the dressing toolhas a diamond point 24 for truing the grinding point The tool holder 26is provided with a set screw 27 for holding the dressing tool inposition. The tool holder may be adjusted vertically by means of theadjusting screw 30 which has two nuts 31 and 32, one below and one abovethe tool holder. By suitably manipulating these nuts the tool holder,and consequently the tool, may be raised or lowered away from or towardthe grinding point.

In practice, when the grinding tool 5 has I- become out of true, theoperator attaches my device to the grinding machine by clamping thesupporting frame 8 in proper position as herein above described. He thenbrings the guide 12 to the proper angle by manipulating the set screws18. It will be understood, of course, that this adjustment need not bemade every time the attachment is used, because it will be necessary tochange the angle only when a grinding point of different conical angleis to be dressed, after the guide is in place and the slide 20 islowered to the proper elevation by manipulating the adjusting nuts 31,32. WVhen the adjustment has been made the operator turns on the powerso as to start thespindle and grinding point to rotating. He thengIaSP-S e an 21 and mores thef iidg I 20 reward wit-Emm guid 12 Whe-nthe v dressing operation is' 'fiiiished' the attach ment may be easilyremoved by simply uu-i screwing the nuts 7- from the bolts 6. I x

. The enguler adjus'tguent of the guide 12- in the supporting. fe 8 maybe easily the meuipulaltiono the device piece is alsee Very siin'plematter as it plicati'on filed o'n'even Khiteuhefewith,

' Naesefiee, v

ll'cleiin as new and" accomplished, for in theiirefeire'd fem-theslotted arm 16 has at graduated scele 38 marked upon its side as shownin Fig. 1.

A center line 39' is marked upon the -pim '14 and the en le of tiltofthe we (end liehee the taper o the grinding point) my be determifiedby ree mg the centerline egaiust thesatlei P The attachment end seat asimple metterthat but true timeend care are required ,for ple'cih" theett zchmerit in epmtih sitiei'i. urtfherihore,

coitsistsfiuerely in moving the slide 20' forwaid or lottckwai'd in theguide 12. For

these reamsand the added reason that the spindle and dressing m1 a meheve to be removed from/the 'igriudin marine, the

operate!" loses very little:time in keepihg. the grmding @001 in prepefreoneitiem=- Att'ntioh is" called to sip- Haviug tliusdesbri *r ter'sPatent, is 1" y detachment of the 7 device to and from the grindingmachine is 1" "it is esteem adapted to be attached to the grindi me.-

perted eud guided by said nude, and e dressing tool carried by said side, the sup-" porting frame and the guide 'hevingcoopereting armsfacing each other oiie of semi arms supportiegserew mechemsm whereby thetilt of the guide relatively to the supporting frame may-he varied.

2. An attachment for ding meehines comprising e supporting frame adaptedto he held stationery, e guide in the form of at reclm'ug frame in saidsupporting e, the

supporting frame and the guide having up-i' stending arms feeing' eachother, said arms Keying a slot and pin connectiouand the slottedarmfeerryiug an edjustihg, screw adapted to engage the pin forregulating the I .tilt 'ef 'e-th'e i eg-end e slide vworkiu f qilnseidguide audprovided with a tool ho flex; v 33. A11 -:etfiachment for6Q te Held stationery, a guide in the form 05%;? street frame in saidsupportini ire gulating Gilill, i uide in the form of a making time 4cradled iii the supporting frame, at slide supr

